In fact, I was referring to the three filly stakes Fairmont referred to. My bad though, it is not generally referred to as the filly triple crown. Which is a term instead used for the 1000 Guineas, Epsom Oaks & St. Leger. Who knew?
Meanwhile, only Davona Dale won the Ky. Oaks, Blackeyed Sudan, and Acorn. 1979 fwiw.
For bettors, I suppose the filly in the Preakness makes both races more interesting. But that is not my concern.